CVE-2021-33638
Run copy with container in a malicious directory may cause container escaping
When the isula cp command is used to copy files from a container to a host machine and the container is controlled by an attacker, the attacker can escape the container.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Run copy with container in a malicious directory may cause container escaping
When the isula cp command is used to copy files from a container to a host machine and the container is controlled by an attacker, the attacker can escape the container.
- Record
CVE-2021-33638- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-665
- Updated
- 2026-11-02
EUVDEUVD-2021-20315
When the isula cp command is used to copy files from a container to a host machine and the container is controlled by an attacker, the attacker can escape the container.
- Record
EUVD-2021-20315- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6qw3-w6wv-8fgg
When the isula cp command is used to copy files from a container to a host machine and the...
When the isula cp command is used to copy files from a container to a host machine and the container is controlled by an attacker, the attacker can escape the container.
- Record
GHSA-6qw3-w6wv-8fgg- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-665
- Updated
- 2026-11-02
NVD
When the isula cp command is used to copy files from a container to a host machine and the container is controlled by an attacker, the attacker can escape the container.
- Record
CVE-2021-33638- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - Weakness
- CWE-665
- Updated
- 2026-11-02
OSVOESA-2023-1686
iSulad security update
Security Fix(es):
When malicious images are pulled by isula pull, attackers can execute arbitrary code.(CVE-2021-33635)
When the isula load command is used to load malicious images, attackers can execute arbitrary code.(CVE-2021-33636)
When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.(CVE-2021-33637)
When the isula cp command is used to copy files from a container to a host machine and the container is controlled by an attacker, the attacker can escape the container.(CVE-2021-33638)
- Record
OESA-2023-1686- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
iSuladopenEuler:20.03-LTS-SP1 From an advisory covering 4 CVEs |
before 2.0.8-20230216.115408.git40ea936a.oe1 | 2.0.8-20230216.115408.git40ea936a.oe1 |
iSuladopenEuler:20.03-LTS-SP3 From an advisory covering 4 CVEs |
before 2.0.18-13.oe1 | 2.0.18-13.oe1 |
iSuladopenEuler:22.03-LTS From an advisory covering 4 CVEs |
before 2.1.3-6.oe2203sp2 | 2.1.3-6.oe2203sp2 |
iSuladopenEuler:22.03-LTS-SP1 From an advisory covering 4 CVEs |
before 2.0.18-13.oe2203sp1 | 2.0.18-13.oe2203sp1 |
iSuladopenEuler:22.03-LTS-SP2 From an advisory covering 4 CVEs |
before 2.1.3-6.oe2203sp2 | 2.1.3-6.oe2203sp2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-33638 is a high vulnerability (CVSS 8.4) in Openeuler Isula, published September 28, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.21%, the 12th percentile. No source names a fixed version.
References
openeuler.org/zh/security/security-bulletins/detail?id=openEuler-SA-2023-1686
gitee.com/src-openeuler/iSulad/pulls/627/files
nvd.nist.gov/vuln/detail/CVE-2021-33638
github.com/advisories/GHSA-6qw3-w6wv-8fgg